@NotNull
private static XmlFileHeader calcXmlFileHeader(final XmlFile file) {
if (file instanceof PsiFileEx
&& ((PsiFileEx) file).isContentsLoaded()
&& file.getNode().isParsed()) {
return computeHeaderByPsi(file);
}
if (!XmlUtil.isStubBuilding() && file.getFileType() == XmlFileType.INSTANCE) {
VirtualFile virtualFile = file.getVirtualFile();
if (virtualFile instanceof VirtualFileWithId) {
ObjectStubTree tree =
StubTreeLoader.getInstance().readFromVFile(file.getProject(), virtualFile);
if (tree != null) {
Stub root = tree.getRoot();
if (root instanceof FileStub) {
return ((FileStub) root).getHeader();
}
}
}
}
if (!file.isValid()) return XmlFileHeader.EMPTY;
return NanoXmlUtil.parseHeader(file);
}
@Override
@NotNull
public XmlFileHeader getXmlFileHeader(XmlFile file) {
return file.isValid()
? ourRootTagCache.get(ROOT_TAG_NS_KEY, file, null).getValue()
: XmlFileHeader.EMPTY;
}
protected CachedValue<XmlFileHeader> compute(final XmlFile file, final Object o) {
return CachedValuesManager.getManager(file.getProject())
.createCachedValue(
new CachedValueProvider<XmlFileHeader>() {
public Result<XmlFileHeader> compute() {
return new Result<XmlFileHeader>(calcXmlFileHeader(file), file);
}
},
false);
}
private static XmlFileHeader computeHeaderByPsi(XmlFile file) {
final XmlDocument document = file.getDocument();
if (document == null) {
return XmlFileHeader.EMPTY;
}
String publicId = null;
String systemId = null;
final XmlProlog prolog = document.getProlog();
if (prolog != null) {
final XmlDoctype doctype = prolog.getDoctype();
if (doctype != null) {
publicId = doctype.getPublicId();
systemId = doctype.getSystemId();
if (systemId == null) {
systemId = doctype.getDtdUri();
}
}
}
final XmlTag tag = document.getRootTag();
if (tag == null) {
return XmlFileHeader.EMPTY;
}
String localName = tag.getLocalName();
if (StringUtil.isNotEmpty(localName)) {
if (tag.getPrevSibling() instanceof PsiErrorElement) {
return XmlFileHeader.EMPTY;
}
String psiNs = tag.getNamespace();
return new XmlFileHeader(
localName,
psiNs == XmlUtil.EMPTY_URI || Comparing.equal(psiNs, systemId) ? null : psiNs,
publicId,
systemId);
}
return XmlFileHeader.EMPTY;
}